package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Slf4j
@Component
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {}

    @Before("autoFillPointCut()")
    public void AutoFill(JoinPoint joinPoint){
        log.info("开始进行公告字段的填充......");

        // 获取操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();

        // 获取当前被拦截的方法的参数
        Object[] args = joinPoint.getArgs();
        Object entity = args[0];

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        switch (operationType){
            case INSERT:
                try {
                    Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                    Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                    Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                    Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                    setCreateTime.invoke(entity, now);
                    setUpdateTime.invoke(entity, now);
                    setCreateUser.invoke(entity, currentId);
                    setUpdateUser.invoke(entity, currentId);

                } catch (Exception e) {
                    e.printStackTrace();
                }
                break;
            case UPDATE:
                try {
                    Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                    Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                    setUpdateTime.invoke(entity, now);
                    setUpdateUser.invoke(entity, currentId);

                }catch (Exception e){
                    e.printStackTrace();
                }
                break;
        }
    }

}
